Numerical study of the effects of human body heat on particle transport and inhalation in indoor environment

2013 ◽  
Vol 59 ◽  
pp. 1-9 ◽  
Author(s):  
Qinjiang Ge ◽  
Xiangdong Li ◽  
Kiao Inthavong ◽  
Jiyuan Tu
Keyword(s):  
Human Body ◽  
Particle Transport ◽  
Indoor Environment ◽  
Numerical Study ◽  
Body Heat

scholarly journals Human body heat for powering wearable devices: From thermal energy to application

2017 ◽  
Vol 131 ◽  
pp. 44-54 ◽  
Author(s):  
Moritz Thielen ◽  
Lukas Sigrist ◽  
Michele Magno ◽  
Christofer Hierold ◽  
Luca Benini
Keyword(s):  
Thermal Energy ◽  
Human Body ◽  
Wearable Devices ◽  
Body Heat

Detection of Human Body Motion Based on Electrostatic Measurements in the Indoor Environment

2011 ◽  
Vol 480-481 ◽  
pp. 1329-1334
Author(s):  
Wei Zheng ◽  
Zhan Zhong Cui
Keyword(s):  
Theoretical Analysis ◽  
Real Time ◽  
Human Body ◽  
Motion Detection ◽  
Average Velocity ◽  
Indoor Environment ◽  
Detection Method ◽  
Body Motion ◽  
The Real ◽  
Multiple Electrodes

An effective non-contact electrostatic detection method is used for human body motion detection. Theoretical analysis and pratical experiments are carried out to prove that this method is effective in the field of human body monitoring, in which a model for human body induced potential by stepping has been proposed. Furthermore, experiment results also prove that it’s feasible to measure the average velocity and route of human body motion by multiple electrodes array. What’s more the real-time velocity and direction of human body motion can be determined by orthogonal electrostatic detector array, and the real-time velocity and direction of human body motion can be obtained within the range of 2 meters.

Tracer trajectories and displacement due to a micro-swimmer near a surface

2015 ◽  
Vol 773 ◽  
pp. 498-519 ◽  
Author(s):  
A. J. T. M. Mathijssen ◽  
D. O. Pushkin ◽  
J. M. Yeomans
Keyword(s):  
Particle Transport ◽  
Numerical Study ◽  
Tracer Particle ◽  
Persistence Length ◽  
Theoretical Work ◽  
Solid Boundary ◽  
Tracer Transport ◽  
Tracer Particles ◽  
Recent Theoretical Work ◽  
Run And Tumble

We study tracer particle transport due to flows created by a self-propelled micro-swimmer, such as a swimming bacterium, alga or a microscopic artificial swimmer. Recent theoretical work has shown that as a swimmer moves in the fluid bulk along an infinite straight path, tracer particles far from its path perform closed loops, whereas those close to the swimmer are entrained by its motion. However, in biologically and technologically important cases tracer transport is significantly altered for swimmers that move in a run-and-tumble fashion with a finite persistence length, and/or in the presence of a free surface or a solid boundary. Here we present a systematic analytical and numerical study exploring the resultant regimes and their crossovers. Our focus is on describing qualitative features of the tracer particle transport and developing quantitative tools for its analysis. Our work is a step towards understanding the ecological effects of flows created by swimming organisms, such as enhanced fluid mixing and biofilm formation.

Flexible and wearable wristband for harvesting human body heat based on coral-like PEDOT:Tos-coated nanofibrous film

2020 ◽  
Vol 30 (1) ◽  
pp. 015003
Author(s):  
Xuefei Zhang ◽  
Ting-Ting Li ◽  
Hai-Tao Ren ◽  
Haokai Peng ◽  
Qian Jiang ◽  
...  
Keyword(s):  
Human Body ◽  
Body Heat

scholarly journals Numerical Study on the Feasibility of a 24 GHz ISM-Band Doppler Radar Antenna for Near-Field Sensing of Human Respiration in Electromagnetic Aspects

2020 ◽  
Vol 10 (18) ◽  
pp. 6159 ◽  
Author(s):  
Seungyong Park ◽  
Sungpeel Kim ◽  
Dong Kyoo Kim ◽  
Jaehoon Choi ◽  
Kyung-Young Jung
Keyword(s):  
Human Body ◽  
Doppler Radar ◽  
Numerical Study ◽  
Near Field ◽  
The Body ◽  
Ism Band ◽  
Human Respiration ◽  
Field Sensing ◽  
Radar Antenna ◽  
24 Ghz

The feasibility study of a 24 GHz industrial, scientific, and medical (ISM) band Doppler radar antenna in electromagnetic aspects is numerically performed for near-field sensing of human respiration. The Doppler radar antenna consists of a transmitting (Tx) antenna and a receiving (Rx) antenna close to the human body for a wearable device. The designed slot-type Doppler radar antenna is embedded between an RO4350B superstrate and an FR-4 substrate. To obtain the higher radiation pattern of the antenna towards the human body, a ground plane reflector is placed underneath the substrate. The measured −10 dB reflection coefficient (S11) bandwidth is 23.74 to 25.56 GHz and the mutual coupling (S21) between Tx and Rx antennas is lower than −30 dB at target frequencies. The Doppler radar performance of the proposed Doppler radar antenna is performed numerically by investigating the signal returned from the human body. The Doppler effect due to human respiration is investigated through the I/Q and arctangent demodulation of the returned signal. According to the results, the phase variation of the returned signal is proportional to the displacement of the body surface, which is about 0.8 rad in accordance with 1 mm displacement. The numerical experiments indicate that the proposed Doppler radar antenna can be used for near-field sensing of human respiration in electromagnetic aspects.

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